Validate circuit designs
Check voltage and resistance with Ohm's law or resistor color tools before soldering.
Science & Engineering
Science & Engineering calculators
Run lab and prototyping math quickly with tools that keep formulas and units clear.
Common physics, chemistry, and electronics calculatorsWorked examples with unit calloutsUseful for labs, homework, and shop floors
Perfect for
- •Students and educators
- •Engineers and technicians
- •Maker labs and hobbyists
What you can solve
Common scenarios
Physics, chemistry, and electronics calculators for density, Ohm's law, resistor color codes, and gas laws.
Confirm lab experiment math
Calculate density, molar mass, or ideal gas values without doing long-form math by hand.
Prepare study guides or labs
Use formulas and worked examples to walk through class demos step by step.
Pick a tool
Featured science & engineering calculators
Browse the live tools below or request a new calculator if you need something specific.
science
Density Calculator
Calculate density by dividing mass by volume.
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Ohm's Law Calculator
Compute current and power from voltage and resistance using Ohm's law.
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Ideal Gas Law Calculator
Compute pressure using PV = nRT with user inputs for moles, temperature, and volume.
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Resistor Color Code Calculator
Convert resistor values into 4-band color codes.
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Half-Life Calculator
Compute remaining quantity after radioactive or exponential decay over time.
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Molar Mass Calculator
Build a chemical formula from up to three elements and compute molar mass plus grams for a sample.
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Wavelength Calculator
Convert frequency and wave speed into wavelength for sound, seismic, or other waves.
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Frequency to Wavelength Converter
Convert electromagnetic frequency to wavelength in meters and nanometers using the speed of light.
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Orbital Period Calculator
Estimate orbital period (Kepler’s third law) from semi-major axis and central mass.
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Gravitational Force Calculator
Compute Newtonian gravitational force between two masses.
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Terminal Velocity Calculator
Estimate the terminal velocity of a falling object using drag coefficient, mass, and cross-sectional area.
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Spring Constant Calculator
Determine spring stiffness (k) from applied force and displacement (Hooke’s law).
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Kinetic Energy Calculator
Calculate kinetic energy from mass and velocity using ½mv².
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Projectile Range Calculator
Compute horizontal range of an ideal projectile given velocity and launch angle.
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Capacitor Charge Calculator
Compute capacitor voltage and charge at any point during RC charging.
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Power Factor Calculator
Calculate power factor and reactive power from real and apparent power.
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Specific Gravity Calculator
Compare the density of a substance to water or another reference substance.
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Means and Medians Calculator
Enter a list of numbers to get the mean and median, plus a count of values.
Open calculator →Why people trust us
Built for real-world decisions
Physics, chemistry, and electronics calculators for density, Ohm's law, resistor color codes, and gas laws.
Formula-first layouts
Equations stay front and center, so each output is easy to trace back to the math.
Unit-aware inputs
Input fields call out required units to reduce mix-ups between SI and imperial measurements.
Shareable explanations
Copy the how-it-works or FAQ text into lab notebooks or SOPs.
Explore related categories
Hop to another topic to keep your project or plan moving.
FAQs
- Can I cite these calculations in official reports?
- Use them as a quick validation step, then confirm results with your own measurements or trusted references before publishing.
- Do you show the formulas behind each calculator?
- Yes. Every tool includes formulas plus worked examples for clarity.
- Will you add more advanced engineering tools?
- We add new calculators in regular updates. If you need a specific one sooner, suggest it through the contact page.